<script lang="jsx">
import { tableProps } from 'ant-design-vue/es/table/Table.js'
import { get } from 'lodash-es'
import draggable from 'vuedraggable-es'
import columnSetting from './columnSetting.vue'
import './index.less'

export default {
	components: {
		draggable,
		columnSetting
	},
	data() {
		return {
			needTotalList: [],
			selectedRows: [],
			selectedRowKeys: [],
			localLoading: false,
			localDataSource: [],
			localPagination: Object.assign({}, this.pagination),
			isFullscreen: false,
			customSize: this.compSize,
			columnsSetting: [],
			localSettings: {
				rowClassName: this.rowClassName,
				rowClassNameSwitch: Boolean(this.rowClassName)
			}
		}
	},
	// eslint-disable-next-line vue/order-in-components
	props: Object.assign({}, tableProps(), {
		rowKey: {
			type: [String, Function],
			default: 'key'
		},
		data: {
			type: Function,
			required: true
		},
		pageNum: {
			type: Number,
			default: 1
		},
		size: {
			type: String,
			default: '10'
		},
		showSizeChanger: {
			type: Boolean,
			default: true
		},
		compSize: {
			type: String,
			default: 'middle'
		},
		alert: {
			type: [Object, Boolean],
			default: null
		},
		rowSelection: {
			type: Object,
			default: null
		},
		/** @Deprecated */
		showAlertInfo: {
			type: Boolean,
			default: false
		},
		showPagination: {
			type: [String, Boolean],
			default: 'auto'
		},
		defaultPageSize: {
			type: Number,
			default: 10
		},
		pageSizeOptions: {
			type: Array,
			default: () => ['10', '20', '50', '100']
		},
		/**
		 * enable page URI mode
		 *
		 * e.g:
		 * /users/1
		 * /users/2
		 * /users/3?queryParam=test
		 * ...
		 */
		pageURI: {
			type: Boolean,
			default: false
		},
		extraTool: {
			type: Array,
			default: () => []
		},
		// 配置工具栏
		toolConfig: {
			type: Object,
			default: () => ({
				refresh: false,
				height: false,
				columnSetting: false,
				striped: false
			})
		}
	}),
	watch: {
		'localPagination.current': function (val) {
			this.pageURI &&
				this.$router.push({
					...this.$route,
					name: this.$route.name,
					params: Object.assign({}, this.$route.params, {
						current: val
					})
				})
		},
		pageNum(val) {
			Object.assign(this.localPagination, {
				current: val
			})
		},
		size(val) {
			Object.assign(this.localPagination, {
				size: val
			})
		},
		showSizeChanger(val) {
			Object.assign(this.localPagination, {
				showSizeChanger: val
			})
		},
		columns(v) {
			this.columnsSetting = v
		}
	},
	created() {
		const { current } = this.$route.params
		const localPageNum = (this.pageURI && current && parseInt(current)) || this.pageNum
		this.localPagination =
			(['auto', true].includes(this.showPagination) &&
				Object.assign({}, this.localPagination, {
					current: localPageNum,
					size: this.size, //this.compSize, size// 改动
					showSizeChanger: this.showSizeChanger,
					defaultPageSize: this.defaultPageSize,
					pageSizeOptions: this.pageSizeOptions,
					showTotal: (total, range) => {
						return `${range[0]}-${range[1]} 共 ${total} 条 `
					}
				})) ||
			false
		this.needTotalList = this.initTotalList(this.columns)
		this.loadData()
		this.columnsSetting = this.columns
	},
	methods: {
		/**
		 * 表格重新加载方法
		 * 如果参数为 true, 则强制刷新到第一页
		 * @param bool Boolean
		 */
		refresh(bool = false) {
			bool && (this.localPagination = Object.assign({}, {
				current: 1, size: this.size
			}))
			this.loadData()
		},
		/**
		 * 加载数据方法
		 * @param {Object} pagination 分页选项器
		 * @param {Object} filters 过滤条件
		 * @param {Object} sorter 排序条件
		 */
		loadData(pagination, filters, sorter) {
			this.localLoading = true
			const parameter = Object.assign({
				current: (pagination && pagination.current) ||
					this.showPagination && this.localPagination.current || this.pageNum,
				size: (pagination && pagination.pageSize) ||
					this.showPagination && this.localPagination.pageSize || this.pageSize
			},
				(sorter && sorter.field && {
					sortField: sorter.field
				}) || {},
				(sorter && sorter.order && {
					sortOrder: sorter.order
				}) || {}, {
				...filters
			}
			)
			const result = this.data(parameter)
			// eslint-disable-next-line
			if (
				(typeof result === 'object' || typeof result === 'function') &&
				typeof result.then === 'function'
			) {
				result.then((r) => {

					if (r == null) {
						this.localLoading = false
						return
					}
					this.localPagination =
						(this.showPagination &&
							Object.assign({}, this.localPagination, {
								current: r.current, // pageNo, // 返回结果中的当前分页数
								total: r.total, // totalRows, // 返回结果中的总记录数
								showSizeChanger: this.showSizeChanger,
								showTotal: (total, range) => {
									return `${range[0]}-${range[1]} 共 ${total} 条 `
								},
								size: (pagination && pagination.size) || this.localPagination.size
							})) ||
						false
					// 后端数据records为null保存修复
					if (r.records == null) {
						r.records = []
					}
					// 为防止删除数据后导致页面当前页面数据长度为 0 ,自动翻页到上一页
					if (r.records.length === 0 && this.showPagination && this.localPagination.current > 1) {
						this.localPagination.current--
						this.loadData()
						return
					}
					// 当情况满足时，表示数据不满足分页大小，关闭 table 分页功能
					try {
						/*
						if ((['auto', true].includes(this.showPagination) && r.total <= (r.pages * this.localPagination.size))) {
							this.localPagination.hideOnSinglePage = true
						}
						*/
						if (!this.showPagination) {
							this.localPagination.hideOnSinglePage = true
						}
					} catch (e) {
						this.localPagination = false
					}
					// 返回结果中的数组数据
					if (this.showPagination === false) {
						// 既然配置了不分页，那么我们这里接收到肯定是数组
						this.localDataSource = []
						if (r instanceof Array) {
							this.localDataSource = r
						}
					} else {
						this.localDataSource = r.records
					}
					this.localLoading = false
				})
			}
		},
		initTotalList(columns) {
			const totalList = []
			columns &&
				columns instanceof Array &&
				columns.forEach((column) => {
					if (column.needTotal) {
						totalList.push({
							...column,
							total: 0
						})
					}
				})
			return totalList
		},
		/**
		 * 用于更新已选中的列表数据 total 统计
		 * @param selectedRowKeys
		 * @param selectedRows
		 */
		updateSelect(selectedRowKeys, selectedRows) {
			this.selectedRows = selectedRows
			this.selectedRowKeys = selectedRowKeys
			const list = this.needTotalList
			this.needTotalList = list.map((item) => {
				return {
					...item,
					total: selectedRows.reduce((sum, val) => {
						const total = sum + parseInt(get(val, item.dataIndex))
						return isNaN(total) ? 0 : total
					}, 0)
				}
			})
		},
		/**
		 * 清空 table 已选中项
		 */
		clearSelected() {
			if (this.rowSelection) {
				this.rowSelection.onChange([], [])
				this.updateSelect([], [])
			}
		},
		/**
		 * 刷新并清空已选
		 */
		clearRefreshSelected(bool = false) {
			this.refresh(bool)
			this.clearSelected()
		},
		/**
		 * 处理交给 table 使用者去处理 clear 事件时，内部选中统计同时调用
		 * @param callback
		 * @returns {*}
		 */
		renderClear(callback) {
			if (this.selectedRowKeys.length <= 0) return null
			return (
				<a
					className="ml-6"
					onClick={() => {
						callback()
						this.clearSelected()
					}}>
					{' '}
					清空{' '}
				</a>
			)
		},
		renderAlert() {
			// 绘制统计列数据
			// eslint-disable-next-line no-unused-vars
			const needTotalItems = this.needTotalList.map((item) => {
				return (
					<span className="mr-3">
						{item.title} 总计 {' '}
						<a className="font-6">{!item.customRender ? item.total : item.customRender(item.total)}</a>
					</span>
				)
			})

			// 绘制 清空 按钮
			// eslint-disable-next-line no-unused-vars
			const clearItem =
				typeof this.alert.clear === 'boolean' && this.alert.clear
					? this.renderClear(this.clearSelected)
					: typeof this.alert.clear === 'function'
						? this.renderClear(this.alert.clear)
						: null

			// 绘制 alert 组件
			if (alert) {
				const message = (
					<div>
						<span className="mr-3">
							已选择: <a className="font-6">{this.selectedRows.length}</a>
						</span>
						{needTotalItems}
						{clearItem}
					</div>
				)

				return <a-alert showIcon class="mb-4" message={message} />
			}
		},
		columnChange(val) {
			this.columnsSetting = val
		},
		renderHeader() {
			let tools = [
				{
					name: 'refresh',
					icon: <sync-outlined class="ml-4" />,
					title: '刷新',
					onClick: () => {
						this.refresh()
					}
				},
				{
					name: 'height',
					icon: <column-height-outlined />,
					title: '密度',
					isDropdown: true,
					menu: () => {
						const onClick = ({ key }) => {
							this.customSize = key
						}
						return (
							<a-menu onClick={onClick} selectable selectedKeys={[this.customSize]}>
								<a-menu-item key="default">默认</a-menu-item>
								<a-menu-item key="middle">中等</a-menu-item>
								<a-menu-item key="small">紧凑</a-menu-item>
							</a-menu>
						)
					},
					onClick: () => {
					}
				},
				{
					name: 'columnSetting',
					icon: <setting-outlined />,
					title: '列设置',
					isPopover: true,
					visible: false,
					menu: () => {
						return <columnSetting columns={this.columns} onColumnChange={this.columnChange} />
					},
					onClick: () => {
					}
				}
			]
			if (this.extraTool.length) {
				tools = tools.concat(this.extraTool)
			}

			// 斑马纹
			const changeRowClass = (value) => {
				const val = value.target.checked
				this.localSettings.rowClassNameSwitch = val
				const evenClass = val ? (_record, index) => (index % 2 === 1 ? 'table-striped' : null) : this.rowClassName
				this.localSettings.rowClassName = evenClass
			}
			return (
				<div className="s-table-tool">
					<div className="s-table-tool-left">{this.$slots.operator && this.$slots.operator()}</div>
					<div className="layout-items-center s-table-tool-right">
						{this.toolConfig.striped ? (
							<div className="layout-items-center ml-4">
								<a-checkbox
									checked={this.localSettings.rowClassNameSwitch}
									onChange={changeRowClass}
								>斑马纹
								</a-checkbox>
							</div>
						) : null}

						{tools.map((tool) => {
							if (!this.toolConfig[tool.name]) {
								return null
							}
							const tooltipEle = (
								<a-tooltip title={tool.title} class="s-tool-item" onClick={tool.onClick}>
									{tool.icon}
								</a-tooltip>
							)
							if (tool.isPopover) {
								return (
									<a-popover
										trigger={'click'}
										placement="topLeft"
										overlayClassName="s-table-column-settings"
										arrow-point-at-center
										content={tool.menu()}>
										{tooltipEle}
									</a-popover>
								)
							}
							if (tool.isDropdown) {
								return (
									<a-dropdown trigger={['click']} overlay={tool.menu()}>
										{tooltipEle}
									</a-dropdown>
								)
							}
							return tooltipEle
						})}
					</div>
				</div>
			)
		}
	},

	render() {
		let props = {}
		const localKeys = Object.keys(this.$data)
		const showAlert =
			(typeof this.alert === 'object' &&
				this.alert !== null &&
				this.alert.show &&
				typeof this.rowSelection.selectedRowKeys !== 'undefined') ||
			this.alert

		Object.keys(tableProps()).forEach((k) => {
			const localKey = `local${k.substring(0, 1).toUpperCase()}${k.substring(1)}`
			if (localKeys.includes(localKey)) {
				props[k] = this[localKey]
				return props[k]
			}
			if (k === 'rowSelection') {
				if (showAlert && this.rowSelection) {
					// 如果需要使用alert，则重新绑定 rowSelection 事件
					props[k] = {
						...this.rowSelection,
						selectedRows: this.selectedRows,
						selectedRowKeys: this.selectedRowKeys,
						onChange: (selectedRowKeys, selectedRows) => {
							this.updateSelect(selectedRowKeys, selectedRows)
							typeof this[k].onChange !== 'undefined' && this[k].onChange(selectedRowKeys, selectedRows)
						}
					}
					return props[k]
				} else if (!showAlert && this.rowSelection) {
					props[k] = {
						...this.rowSelection,
						selectedRows: this.selectedRows,
						selectedRowKeys: this.selectedRowKeys,
						onChange: (selectedRowKeys, selectedRows) => {
							this.updateSelect(selectedRowKeys, selectedRows)
							typeof this[k].onChange !== 'undefined' && this[k].onChange(selectedRowKeys, selectedRows)
						}
					}
					return props[k]
				} else if (!this.rowSelection) {
					// 如果没打算开启 rowSelection 则清空默认的选择项
					props[k] = null
					return props[k]
				}
			}
			this[k] && (props[k] = this[k])
			// 此处配置表格大小与要显示的列
			props = {
				...props,
				size: this.customSize, // 注意这个size是a-table组件需要的，这里不能跟别的地方成为compSize
				columns: this.columnsSetting.filter((value) => value.checked === undefined || value.checked)
			}
			return props[k]
		})
		const table = (
			<a-table
				{...props}
				{...this.localSettings}
				v-slots={this.$slots}
				onChange={this.loadData}
				onExpand={(expanded, record) => {
					this.$emit('expand', expanded, record)
				}}
			/>
		)

		return (
			<div className="table-wrapper">
				{this.renderHeader()}
				{showAlert ? this.renderAlert() : null}
				{table}
			</div>
		)
	}
}
</script>
